Zircon - definizione. Che cos'è Zircon
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Cosa (chi) è Zircon - definizione

MINERAL BELONGING TO THE GROUP OF NESOSILICATES
Zirconium orthosilicate; Matura Diamond; Zirucon; Zircons; Blue Zircon; Yellow zircon; Hyacinth (mineral)
  • SEM-CL image of Zircon grain showing zonations and poly-cycles (core-rim structure)
  • A pale blue zircon gemstone weighing 3.36 carats

Zircon         
·noun A mineral occurring in tetragonal crystals, usually of a brown or gray color. It consists of silica and zirconia. A red variety, used as a gem, is called hyacinth. Colorless, pale-yellow or smoky-brown varieties from Ceylon are called jargon.
zircon         
A girl that's pretty enough to date but you can't get serious about, as in worthy of a cubic zirconia but not a diamond.
Cheri's sweet, but that hyena laugh makes her a zircon.
zircon         
['z?:k(?)n]
¦ noun a mineral consisting of zirconium silicate, typically brown but sometimes in translucent forms of gem quality.
Origin
C18: from Ger. Zirkon.

Wikipedia

Zircon

Zircon () is a mineral belonging to the group of nesosilicates and is a source of the metal zirconium. Its chemical name is zirconium(IV) silicate, and its corresponding chemical formula is ZrSiO4. An empirical formula showing some of the range of substitution in zircon is (Zr1–y, REEy)(SiO4)1–x(OH)4x–y. Zircon precipitates from silicate melts and has relatively high concentrations of high field strength incompatible elements. For example, hafnium is almost always present in quantities ranging from 1 to 4%. The crystal structure of zircon is tetragonal crystal system. The natural color of zircon varies between colorless, yellow-golden, red, brown, blue, and green.

The name derives from the Persian zargun, meaning "gold-hued". This word is changed into "jargoon", a term applied to light-colored zircons. The English word "zircon" is derived from Zirkon, which is the German adaptation of this word. Yellow, orange, and red zircon is also known as "hyacinth", from the flower hyacinthus, whose name is of Ancient Greek origin.